Inspection Procedure 18: Odor, White Smoke, Black Smoke, and High-Concentration CO/HC during Idling

COMMENT ON TROUBLE SYMPTOM

Failure is possibly caused by improper air-fuel ratio, deteriorated catalyst, failed ignition system, failed fuel system, failed compression pressure or other faults.

PROBABLE CAUSE

Incorrect air/fuel ratio

Failed ignition system

Failed fuel system

Failed intake and exhaust system

Failed emission control system

Failed compression pressure

Failed catalytic converter

Failed engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. MUT-II/III diagnosis code

Q: Diagnosis code set?

YES: Inspection chart for diagnosis code (Refer to

).
NO: Go to Step 2

STEP 2. Check injector for operating sound.

Check injector for operating sound (Refer to ).

Q: Can operating sound be heard?

YES: Go to Step 3

.
NO:

Check the injector system of the defective cylinder.

(Refer to, Code No. P0201: No. 1 injector system ).

(Refer to, Code No. P0202: No. 2 injector system ).

(Refer to, Code No. P0203: No. 3 injector system ).

(Refer to, Code No. P0204: No. 4 injector system ).

STEP 3. Check ignition timing.

Check ignition timing. (Refer to GROUP 11E - On-vehicle Service - Ignition Timing Check ).

Q: Is the check result normal?

YES: Go to Step 4

.
NO: Check for offset ignition timing (Refer to Inspection Procedure 17

STEP 4. MUT-II/III data list

Refer to Data List Reference Table .

Item 12: Air flow sensor

Item 13: Intake air temperature sensor

Item 21: Engine coolant temperature sensor

Item 95: Manifold absolute pressure sensor

Q: Are the check results normal?

YES: Go to Step 5

.
NO: Perform the diagnosis code classified check Procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code

STEP 5: MUT-II/III data list

Refer to Data List Reference Table .

Item 25: Barometric pressure sensor

Q: Are the check results normal?

YES: Go to Step 6

.
NO: Replace engine-A/T-ECU.

STEP 6. Check air intake from intake hose and inlet manifold.

Q: Is the check result normal?

YES: Go to Step 7

.
NO: Repair.

STEP 7. Check for emission leakage from exhaust manifold.

Q: Is the check result normal?

YES: Go to Step 8

.
NO: Repair.

STEP 8. Check throttle body (throttle valve portion) for contamination.

Q: Is the check result normal?

YES: Go to Step 9

.
NO: Clean throttle body (throttle valve portion) (Refer to

STEP 9. MUT-II/III data list

Refer to Data list reference table .

Item 11: Oxygen sensor

Item 39: Cylinder 2, 3 oxygen sensor (front) <Vehicles for Hong kong>

Item 59: Oxygen sensor

Item 69: Cylinder 2, 3 oxygen sensor (rear) <Vehicles for Hong kong>

Q: Is the check result normal?

YES: Go to Step 10

.
NO: Perform the diagnosis code classified check Procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code

STEP 10. Check Purge control solenoid valve itself.

Check purge control solenoid valve itself (Refer to GROUP 17 - Emission Control System - Evaporative Emission Control System - Purge Control Solenoid Valve Check ).

Q: Is the check result normal?

YES: Go to Step 11

.
NO: Replace purge control solenoid valve.

STEP 11. Check EGR valve (stepper motor) itself.

Check EGR valve (stepper motor) itself [Refer to GROUP 17 - Emission Control System - Exhaust Gas Recirculation (EGR) System - EGR Valve (Stepper Motor) Check <4G69>].

Q: Is the check result normal?

YES: Go to Step 12

.
NO: Replace EGR valve (stepper motor).

STEP 12. Measure fuel pressure.

Measure fuel pressure (Refer to ).

Q: Is the check result normal?

YES: Go to Step 13

.
NO: Repair.

STEP 13. Check positive crankcase ventilation valve itself.

Check positive crankcase ventilation valve itself (Refer to GROUP 17 - Emission Control System - crankcase Emission Control System - Positive Crankcase Ventilation (PCV) Valve Check ).

Q: Is the check result normal?

YES: Go to Step 14

.
NO: Replace positive crankcase ventilation valve.

STEP 14. Check spark plug.

Q: Is the check result normal?

YES: Go to Step 15

.
NO: Replace spark plug.

STEP 15. Check ignition coil itself.

Check ignition coil itself (Refer to GROUP 16 - Ignition System - On-vehicle Service - Ignition Coil Check <4G69>).

Q: Is the check result normal?

YES: Go to Step 16

.
NO: Replace ignition coil.

STEP 16. Check compression pressure.

Check compression pressure (Refer to GROUP 11E - On-vehicle Service - Compression Pressure Check ).

Q: Is the check result normal?

YES: Go to Step 17

.
NO: Repair.

STEP 17. Check injector for spraying condition.

Check each injector for spray condition (Refer to ).

Q: Does trouble symptom persist?

YES: Go to Step 18

.
NO: Replace injector.

STEP 18. Replace catalytic converter.

After replacing the catalytic converter, re-check the trouble symptoms.

Q: Does trouble symptom persist?

YES: Replace engine-A/T-ECU.
NO: Check end.


Inspection Procedure 18: Odor, White Smoke, Black Smoke, and High-Concentration CO/HC during Idling

COMMENT ON TROUBLE SYMPTOM Failure is possibly caused by improper air-fuel ratio, deteriorated catalyst, failed ignition system, failed fuel system, failed compression pressure or other faults.
PROBABLE CAUSE Incorrect air/fuel ratio Failed ignition system Failed fuel system Failed intake and exhaust system Failed emission control system Failed compression pressure Failed catalytic converter Failed engine-A/T-ECU
	DIAGNOSIS PROCEDURE

	STEP 1. MUT-II/III diagnosis code Q: Diagnosis code set? YES: Inspection chart for diagnosis code (Refer to ). NO: Go to Step 2 .
	STEP 2. Check injector for operating sound. Check injector for operating sound (Refer to ). Q: Can operating sound be heard? YES: Go to Step 3 . NO: Check the injector system of the defective cylinder. (Refer to, Code No. P0201: No. 1 injector system ). (Refer to, Code No. P0202: No. 2 injector system ). (Refer to, Code No. P0203: No. 3 injector system ). (Refer to, Code No. P0204: No. 4 injector system ).
	STEP 3. Check ignition timing. Check ignition timing. (Refer to GROUP 11E - On-vehicle Service - Ignition Timing Check ). Q: Is the check result normal? YES: Go to Step 4 . NO: Check for offset ignition timing (Refer to Inspection Procedure 17 ).
	STEP 4. MUT-II/III data list Refer to Data List Reference Table . Item 12: Air flow sensor Item 13: Intake air temperature sensor Item 21: Engine coolant temperature sensor Item 95: Manifold absolute pressure sensor Q: Are the check results normal? YES: Go to Step 5 . NO: Perform the diagnosis code classified check Procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).
	STEP 5: MUT-II/III data list Refer to Data List Reference Table . Item 25: Barometric pressure sensor Q: Are the check results normal? YES: Go to Step 6 . NO: Replace engine-A/T-ECU.
	STEP 6. Check air intake from intake hose and inlet manifold. Q: Is the check result normal? YES: Go to Step 7 . NO: Repair.
	STEP 7. Check for emission leakage from exhaust manifold. Q: Is the check result normal? YES: Go to Step 8 . NO: Repair.
	STEP 8. Check throttle body (throttle valve portion) for contamination. Q: Is the check result normal? YES: Go to Step 9 . NO: Clean throttle body (throttle valve portion) (Refer to ).
	STEP 9. MUT-II/III data list Refer to Data list reference table . Item 11: Oxygen sensor Item 39: Cylinder 2, 3 oxygen sensor (front) <Vehicles for Hong kong> Item 59: Oxygen sensor Item 69: Cylinder 2, 3 oxygen sensor (rear) <Vehicles for Hong kong> Q: Is the check result normal? YES: Go to Step 10 . NO: Perform the diagnosis code classified check Procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).
	STEP 10. Check Purge control solenoid valve itself. Check purge control solenoid valve itself (Refer to GROUP 17 - Emission Control System - Evaporative Emission Control System - Purge Control Solenoid Valve Check ). Q: Is the check result normal? YES: Go to Step 11 . NO: Replace purge control solenoid valve.
	STEP 11. Check EGR valve (stepper motor) itself. Check EGR valve (stepper motor) itself [Refer to GROUP 17 - Emission Control System - Exhaust Gas Recirculation (EGR) System - EGR Valve (Stepper Motor) Check <4G69>]. Q: Is the check result normal? YES: Go to Step 12 . NO: Replace EGR valve (stepper motor).
	STEP 12. Measure fuel pressure. Measure fuel pressure (Refer to ). Q: Is the check result normal? YES: Go to Step 13 . NO: Repair.
	STEP 13. Check positive crankcase ventilation valve itself. Check positive crankcase ventilation valve itself (Refer to GROUP 17 - Emission Control System - crankcase Emission Control System - Positive Crankcase Ventilation (PCV) Valve Check ). Q: Is the check result normal? YES: Go to Step 14 . NO: Replace positive crankcase ventilation valve.
	STEP 14. Check spark plug. Q: Is the check result normal? YES: Go to Step 15 . NO: Replace spark plug.
	STEP 15. Check ignition coil itself. Check ignition coil itself (Refer to GROUP 16 - Ignition System - On-vehicle Service - Ignition Coil Check <4G69>). Q: Is the check result normal? YES: Go to Step 16 . NO: Replace ignition coil.
	STEP 16. Check compression pressure. Check compression pressure (Refer to GROUP 11E - On-vehicle Service - Compression Pressure Check ). Q: Is the check result normal? YES: Go to Step 17 . NO: Repair.
	STEP 17. Check injector for spraying condition. Check each injector for spray condition (Refer to ). Q: Does trouble symptom persist? YES: Go to Step 18 . NO: Replace injector.
	STEP 18. Replace catalytic converter. After replacing the catalytic converter, re-check the trouble symptoms. Q: Does trouble symptom persist? YES: Replace engine-A/T-ECU. NO: Check end.